A Placebo Controlled Trial Of L-Tryptophan In Post-Operative Delirium

2014-08-27 03:23:31 | BioPortfolio


Post-operative delirium is a common and deleterious complication in elderly patients. The investigators have previously found lower levels of serum tryptophan in post-operative elderly patients who developed delirium in comparison to post-operative elderly patients who did not develop delirium. The investigators hypothesize that post-operative supplementation of L-tryptophan will reduce the duration and incidence of post-operative delirium. This study is a double-blinded placebo controlled trial of L-tryptophan supplementation in post-operative ICU patients 60 years and older. The primary outcome measure is the comparison of duration of post-operative delirium in subjects who receive L-tryptophan supplementation versus a similar appearing control.

Study Design

Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Prevention


Post-Operative Delirium


L-tryptophan supplementation, placebo


Denver Veterans Affairs Medical Center
United States




University of Colorado, Denver

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:23:31-0400

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Medical and Biotech [MESH] Definitions

A form of DELIRIUM which occurs after GENERAL ANESTHESIA.

A dioxygenase with specificity for the oxidation of the indoleamine ring of TRYPTOPHAN. It is a LIVER-specific enzyme that is the first and rate limiting enzyme in the kynurenine pathway of TRYPTOPHAN catabolism.

Cognitive disorders including delirium, dementia, and other cognitive disorders. These may be the result of substance use, trauma, or other causes.

An enzyme that activates tryptophan with its specific transfer RNA. EC

An acute organic mental disorder induced by cessation or reduction in chronic alcohol consumption. Clinical characteristics include CONFUSION; DELUSIONS; vivid HALLUCINATIONS; TREMOR; agitation; insomnia; and signs of autonomic hyperactivity (e.g., elevated blood pressure and heart rate, dilated pupils, and diaphoresis). This condition may occasionally be fatal. It was formerly called delirium tremens. (From Adams et al., Principles of Neurology, 6th ed, p1175)

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